add_contextual_help( $this->page, '<p>' . __( 'You can set a custom image header for your site. Simply upload the image and crop it, and the new header will go live immediately.' ) . '</p>' .

'<p>' . __( 'If you want to discard your custom header and go back to the default included in your theme, click on the buttons to remove the custom image and restore the original header image.' ) . '</p>' .